Diagnosis and Management of Obesity Hypoventilation Syndrome during Labor

Table 1

Arterial blood gas values from preconception to postpartum.

Time point, relative to day of admission	Partial pressure of carbon dioxide (mm Hg)	Partial pressure of oxygen (mm Hg)	Serum bicarbonate concentration (mmol/L)	Oxygen delivery type	Fraction of inspired oxygen (%) or delivery of oxygen (L/min)
2 years prior to admission	n/a	n/a	27–33	Natural airway	21%
Hospital day 1, time 23 : 11	n/a	n/a	21	Natural airway	21%
Hospital day 2, time 7 : 01	n/a	n/a	22	Natural airway	21%
Hospital day 2, time 16 : 27	n/a	n/a	21	Natural airway	21%
Hospital day 2, time 21 : 23	n/a	n/a	22	Natural airway	21%
Hospital day 3, time 6 : 15	n/a	n/a	21	Natural airway	21%
Hospital day 3, time 10 : 39	n/a	n/a	21	Natural airway	21%
Hospital day 3, time 15 : 38	n/a	n/a	22	Natural airway	21%
Hospital day 3, time 17 : 26	n/a	n/a	20	Natural airway	21%
Hospital day 3, time 21 : 14	n/a	n/a	21	Natural airway	21%
Hospital day 4, time 2 : 30	n/a	n/a	22	Natural airway	21%
Hospital day 4, time 8 : 39	n/a	n/a	20	Natural airway	21%
Hospital day 4, time 14 : 44	n/a	n/a	23	NRM	10 l/min
Hospital day 4, time 15 : 40	47	96	21	NRM	10 l/min
Hospital day 4, time 17 : 13	49	124	21	CPAP	100%
Hospital day 4, time 21 : 20	48	125	20	ETT	100%
Hospital day 4, time 23 : 27	n/a	n/a	22	ETT	40%
Hospital day 4, time 23 : 39	68	90	22	ETT	40%
Hospital day 5, time 1 : 05	61	63	23	ETT	40%
Hospital day 5, time 2 : 32	n/a	n/a	22	ETT	80%
Hospital day 5, time 2 : 33	54	94	22	ETT	80%
Hospital day 5, time 3 : 33	47	78	21	ETT	50%
Hospital day 5, time 4 : 22	n/a	n/a	20	ETT	50%
Hospital day 5, time 7 : 58	n/a	n/a	21	ETT	50%
Hospital day 5, time 8 : 28	43	83	22	ETT	50%
Hospital day 5, time 11 : 40	n/a	n/a	22	ETT	50%
Hospital day 5, time 16 : 39	n/a	n/a	24	ETT	50%
Hospital day 5, time 21 : 37	41	90	21	ETT	50%
Hospital day 6, time 4 : 05	n/a	n/a	23	ETT	40%
Hospital day 6, time 6 : 24	42	93	26	ETT	40%
Hospital day 6, time 10 : 20	n/a	n/a	26	ETT	40%
Hospital day 6, time 12 : 05	42	101	27	ETT	40%
Hospital day 6, time 15 : 05	n/a	n/a	26	CPAP	25%
Hospital day 6, time 16 : 21	37	69	27	CPAP	25%
Hospital day 6, time 22 : 29	n/a	n/a	25	Natural airway	21%
Hospital day 7, time 4 : 10	n/a	n/a	24	CPAP	25%
Hospital day 7, time 10 : 11	n/a	n/a	29	Natural airway	21%
Hospital day 7, time 22 : 36	n/a	n/a	26	CPAP	25%
Hospital day 8, time 7 : 32	n/a	n/a	27	CPAP	25%

CPAP, continuous positive airway pressure; ETT, endotracheal tube; L, liter; min, minute; mm Hg, millimeter of mercury; mmol, millimole; n/a, not available; NRM, non-rebreather mask.